thermal: adc-tm: Add ADC_TM driver snapshot

ADC_TM peripheral is used by client to set
thresholds on channels supported by VADC and send
notification once set thresholds are crossed. The
driver registers thermistors used for thermal
mitigation with of_thermal to allow thermal driver
to set thresholds and receive notification through
thermal sysfs.

This snapshot is taken as of msm-4.14
'commit <2913cfe3> ("Merge "iommu: arm-smmu: wait for
writes to complete before power off"")'.

Change-Id: Iff8fad8730990d35cbee5518329a970ce108c5c3
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>